fgetwln.c revision 132242
1132242Stjr/*- 2132242Stjr * Copyright (c) 2002-2004 Tim J. Robbins. 3132242Stjr * All rights reserved. 4132242Stjr * 5132242Stjr * Redistribution and use in source and binary forms, with or without 6132242Stjr * modification, are permitted provided that the following conditions 7132242Stjr * are met: 8132242Stjr * 1. Redistributions of source code must retain the above copyright 9132242Stjr * notice, this list of conditions and the following disclaimer. 10132242Stjr * 2. Redistributions in binary form must reproduce the above copyright 11132242Stjr * notice, this list of conditions and the following disclaimer in the 12132242Stjr * documentation and/or other materials provided with the distribution. 13132242Stjr * 14132242Stjr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15132242Stjr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16132242Stjr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17132242Stjr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18132242Stjr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19132242Stjr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20132242Stjr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21132242Stjr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22132242Stjr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23132242Stjr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24132242Stjr * SUCH DAMAGE. 25132242Stjr */ 26132242Stjr 27132242Stjr#include <sys/cdefs.h> 28132242Stjr__FBSDID("$FreeBSD: head/lib/libc/stdio/fgetwln.c 132242 2004-07-16 06:06:09Z tjr $"); 29132242Stjr 30132242Stjr#include "namespace.h" 31132242Stjr#include <stdio.h> 32132242Stjr#include <wchar.h> 33132242Stjr#include "un-namespace.h" 34132242Stjr#include "libc_private.h" 35132242Stjr#include "local.h" 36132242Stjr 37132242Stjrwchar_t * 38132242Stjrfgetwln(FILE * __restrict fp, size_t *lenp) 39132242Stjr{ 40132242Stjr wint_t wc; 41132242Stjr size_t len; 42132242Stjr 43132242Stjr FLOCKFILE(fp); 44132242Stjr ORIENT(fp, 1); 45132242Stjr 46132242Stjr len = 0; 47132242Stjr while ((wc = __fgetwc(fp)) != WEOF) { 48132242Stjr#define GROW 512 49132242Stjr len++; 50132242Stjr if (len * sizeof(wchar_t) >= fp->_lb._size && 51132242Stjr __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) 52132242Stjr goto error; 53132242Stjr *((wchar_t *)fp->_lb._base + len) = wc; 54132242Stjr if (wc == L'\n') 55132242Stjr break; 56132242Stjr } 57132242Stjr if (len == 0) 58132242Stjr goto error; 59132242Stjr 60132242Stjr FUNLOCKFILE(fp); 61132242Stjr *lenp = len; 62132242Stjr return ((wchar_t *)fp->_lb._base); 63132242Stjr 64132242Stjrerror: 65132242Stjr FUNLOCKFILE(fp); 66132242Stjr *lenp = 0; 67132242Stjr return (NULL); 68132242Stjr} 69